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Re: [TowerTalk] Solar Array Noise

To: "Wilson" <infomet@embarqmail.com>
Subject: Re: [TowerTalk] Solar Array Noise
From: "Tracey Gardner" <tracey.gardner@talktalk.net>
Date: Tue, 28 Oct 2014 17:43:43 -0000
List-post: <towertalk@contesting.com">mailto:towertalk@contesting.com>

Virtually all the inverters in use in the UK are 50Hz ones as they are grid connected, so we don't generally get the problems that you're talking about

http://www.windandsun.co.uk/products/Inverters/SMA-Inverters/Sunny-Boy-Inverters

73s Tracey G5VU


----- Original Message ----- From: "Wilson" <infomet@embarqmail.com>
To: <towertalk@contesting.com>
Sent: Tuesday, October 28, 2014 4:23 PM
Subject: [TowerTalk] Solar Array Noise


A little speculation:
I don't know, but doubt there are many actual 60Hz inverters out there and they would be horrendously costly at multiKW levels, not to mention inefficient. Switch rates are tens of KHz, square waves, thus the noise, so the secret is shielding and choking. Visit all the sites you can, with a pocket radio tuned to the AM band. I expect you'll be able to tell which are noisy. Your dealer should be able to take you to sites with the hardware he's selling. And be SURE you understand your contract with your power company. They won't pay you any more than they have to. They will also give you a hard time about batteries, if you are in an area where they are required to pay premium rates for green power. Charging your batteries at off peak rate and dumping them for green rate is NOT what they have in mind! I know people who have batteries for backup, but they are locked out of the outgoing circuit somehow.
WL


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